“…Of the 31 included studies, 9 were cross-sectional studies (4966 women; including at least 1591 primiparous women), 3 were case–control studies (368 women; including at least 357 primiparous women), 5 were retrospective cohort studies (1872 women; including at least 474 primiparous women) and 14 were prospective cohort studies (4217 women; including at least 3338 primiparous women). The studies were published between 2005 and 2022, originating from 17 countries including Turkey [ 59 , 60 , 61 , 62 , 63 , 64 ], the United States of America [ 65 , 66 , 67 , 68 ], Iran [ 69 , 70 , 71 , 72 ], Australia [ 73 , 74 ], Austria [ 75 ], Egypt [ 76 ], Poland [ 77 ], Germany [ 78 ], Japan [ 79 ], Italy [ 80 , 81 ], Switzerland [ 82 ], Hungary [ 83 ], China [ 84 ], Taiwan [ 85 ], Sweden [ 86 ], Israel [ 87 ] and Portugal [ 88 ]. One study did not disclose the country of origin of the research [ 89 ].…”